Dyfyniad APA

(2011). Annual eđitions: Educational psychology 2010/2011. Boston: McGraw-Hill.

Dyfyniad Arddull Chicago

Annual Eđitions: Educational Psychology 2010/2011. Boston: McGraw-Hill, 2011.

Dyfyniad MLA

Annual Eđitions: Educational Psychology 2010/2011. Boston: McGraw-Hill, 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.